The number of people thought to be involved in the alleged “unmasking” of American citizens under the Obama administration could be expanding, according to a source close to the House Intelligence Committee’s review.

The source with knowledge of the review told Fox News the records suggest the unmasking “goes beyond” key officials like former National Security Adviser Susan Rice, former CIA Director John Brennan and former U.S. Ambassador to the U.N. Samantha Power.

The source said more than a half-dozen former senior Obama administration officials are now of interest to House committee investigators. | More…